<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        const s1 = new Set()

        console.log(s1);

        const s2 = new Set("asdfijiefjifv")

        console.log(s2);
        

        
    </script>
</body>
</html>